【急】問 Maths [復制鏈接]

In the figture, O is the centre of two concentric circles. AB is a tangent to the inner circle at M. OA and OB cut the circumferance of the inner circle at N and P respectively. If OM = 21 and AB = 40, find the length of AN

post in wrong place?

下面是引用Tam Chun O於2006-01-24 19:07發表的:
post in wrong place?

I know but it 急

可唔可以急到唔好post錯區呀，我忍左好多次架喇喎~

下面是引用超迪仔於2006-01-24 19:07發表的:
可唔可以急到唔好post錯區呀，我忍左好多次架喇喎~

sorry
but it 急

move the topic after two days
OK???

你又好似試得太多次……


有時D野，比你一次半次方便之門，就唔好濫用嘛。唔係第日版主一律封殺时就無隱啦…

下面是引用freezefox於2006-01-24 19:10發表的:
你又好似試得太多次……
有時D野，比你一次半次方便之門，就唔好濫用嘛。唔係第日版主一律封殺时就無隱啦…

last

OM = 21 and AB = 40
AM=40/2=20
OA^2=20^2+21^2=841
OA=29
OM=ON=小圓半徑
OA-ON=AN
29-21=8

下面是引用Elvis於2006-01-24 19:17發表的:
OM = 21 and AB = 40
AM=40/2=20
OA^2=20^2+21^2=841
OA=29
OM=ON=小圓半徑
.......

係喎，點解睇唔起
thx a lot


可以移，唔會再用急喺度post，會返嗰邊